Http

Question 1

Which HTTP-Methods exist?

Answer 1

GET - Retrieve
HEAD - Retrieve without Response-Body
POST - Action / write
PUT - Action / write
PUT - Action / write (most of the time single values)
DELETE - Remove
PURGE - Removing objects from cache?!
OPTIONS - Describe communication options for target object
TRACE - Testing trace to resource
CONNECT - Establish tunnel to the server

Question 2

How can the maximum count of redirections can be customized for a request?

Answer 2

$response = $client->request('GET', 'https://...', [
    // 0 means to not follow any redirect
    'max_redirects' => 0,
]);

Question 3

How can the used BASE_URI be randomized for an HTTP-Client?

Why would we do that?

Answer 3

$response = $client->request('GET', 'some-page', [
    'base_uri' => [
        [
            // a single random URI from this array will be used for the first request
            'https://example.com/a/',
            'https://example.com/b/',
        ],
        // non-nested base URIs are used in order
        'https://example.com/c/',
    ],
]);

Could be done to distribute the load to different nodes.

Question 4

HTTP 100

Answer 4

Continue

Question 5

HTTP 101

Answer 5

Switch protocol

Question 6

HTTP 200

Answer 6

OK

Question 7

HTTP 201

Answer 7

Created

Question 8

HTTP 202

Answer 8

Accepted

Question 9

HTTP 203

Answer 9

Non-Authoritative Information

Question 10

HTTP 204

Answer 10

Empty Response

Question 11

HTTP 205

Answer 11

Reset content (Server fulfilled request, client should reload view)

Question 12

HTTP 300

Answer 12

Multiple Choices (target resource has multiple representations, client can choose)

Question 13

HTTP 301

Answer 13

Moved Permanently (new route is in Location-Header, so client will be redirected)

Question 14

HTTP 302

Answer 14

Found (Target resource temporarily located under different location)

Question 15

HTTP 307

Answer 15

Temporary redirect to another location

Question 16

HTTP 400

Answer 16

Bad Request (bad syntax, exceeds limitations etc)

Question 17

HTTP 401

Answer 17

Unauthorized

Question 18

HTTP 403

Answer 18

Forbidden

Question 19

HTTP 404

Answer 19

Resource not found

Question 20

HTTP 405

Answer 20

Method not allowed (E.g. when POST is requested but not allowed)

Question 21

HTTP 406

Answer 21

Not acceptable

Question 22

HTTP 408

Answer 22

Request timeout

Question 23

HTTP 413

Answer 23

Payload too large

Question 24

HTTP 415

Answer 24

Unsupported media type

Question 25

HTTP 426

Answer 25

Upgrade required (server refuses to perform request using current protocol. Upgrading protocol might help)

Question 26

HTTP 500

Answer 26

Internal server error

Question 27

HTTP 501

Answer 27

Not implemented

Question 28

HTTP 502

Answer 28

Bad Gateway (Server acts as proxy but target couldnt fulfill the request)

Question 29

HTTP 503

Answer 29

Service unavailable (e.g. during maintaining)

Question 30

HTTP 504

Answer 30

Gateway timeout (Server acts as proxy but target request timed out)

Question 31

HTTP 505

Answer 31

HTTP-Version not supported

Question 32

How can the users preferred language (Request Header: "Accept-Language") be used as locale automatically?

Answer 32

Configure it in the framework-config ``` framework: # ... set_locale_from_accept_language: true ```

Question 33

How can we create a client to cache requests?

Answer 33

``` $store = new Store('/path/to/cache/storage/'); $client = HttpClient::create(); $client = new CachingHttpClient($client, $store); // this won't hit the network if the resource is already in the cache $response = $client->request('GET', 'https://example.com/cacheable-resource'); ```